Added DeviceUsage logic. Requires testing on NYC program with real hardware. Ready for Merge.

Essentials Core/PepperDashEssentialsBase/Devices/IUsageTracking.cs

@@ -31,6 +31,8 @@ namespace PepperDash.Essentials.Core
 
         public UsageTracking()
         {
+            InUseTracker = new InUseTracking();
+
             InUseTracker.InUseFeedback.OutputChange +=new EventHandler<EventArgs>(InUseFeedback_OutputChange);
         }